Paper-making machine.



No. 844,938. PATENTED FEB. 19, 1907. W. H. HOFFMAN.

PAPER MAKIN G MACHINE.

APPLIOATION TILED OCT. 26, 1906.

/ 1 ATTOHNE rs men t.

' sheet B by the jinalihag-cylinder C, which car- \VILLIAM H.

To IP/IUIII it lll llj/ far/ marm- Be it known that .i, .VHJLr/iiu ii.ilori- MAN, a citizen oi the United States, and a resident of inttlcFalls, in the cour y of llcrkhner and State oi. New kforli, have in lVented new and useful iirnprovcincnts in Paper-Making Machines, of whichthe iollou= ing is a full, clear, and exact description. The inventionrelates to cylinder and Fourdrinier machines; and its object is toprovide certain new and useful lflllplOYQ-l merits in paper-makingmachines whereby light-Weight stuck, such as is usecl for making 1tissue and toilet paper, is prevented from sticking and breaking.Yililfi passing the press-rolls, thus producing a better on ality ofFigure l is a side elevation of the in1prevepaper, vincreasing; thecapacity of the nut-l Fig. 2 is an 1 urged sectional side elevation ofthe press ils, the aprons, and the paper sheet passin between the apronsand press-rolls; and. 3 is a plan View of the driving-gear for is lowerpress-roll, the making-cvlindcr, auu the couclvroll. 1

The pulp in the rat It is formed into a wet ries the sheet to theendless apron l), passing between the rushing-cylinder U and ticouch-roll ll, arranged on the top oi the ii! ing-eylimlcr (l in theusual manner. The 1 apron i), with the sheet u'l paper 3 thereon, passesfrom the couch-roll l) to and between 3 the upper and lower press-rollsl5 anal i and then passes to anal arouinl the couch-roll =1 running incontact with the iirst rlryiu ycy inder ii, As shown in Fig.1, the apronl.) is I in contact with a portion of the peripheral face of thedrying-cylimlcr ll, and the retur or lower run of the apron D passesover a sorics of guidcrr llers i, hack to and. between theImiking-cylimler C anti the iirst c0uchroll E. Guide-rollers l for theupper run of the apron'D are arranged between the couchrollE and. thepress-rolls l and F. A second I endless apron J passes around the lowerhalf l Specification of Letters Patent.

Application filed October: 26. 1906. Serial lilo. 340,663

I and a belt witli the couch-roll G, (see that,

--, NEW roan.

Patented Feb. 19, 1907.

of the upper press-roll B, so that the sheet of paper B is for the timebeing between the aprons D and J--that is, While passing be- F tween thep1css-rolls F and F, as will be readily understood by reference to Fig.2, the

additionai apron J prevents the sheet of paper l3 troin sticking to theupper press-roll l iiiiv r s i i i tans preventing lnea ring, or otherIIIJUIY to the sheet of paper. The apron J passes over a series ofguide-rollers K- aud also through a Washing device L for kceping theapron ii :iean, '7

The lower press-roll F has its shaft F connected with suitable machineryfor driving the press roll i and this shaft F is conncctc-d by adriving: device 6, such as pulleys,

anti belt with the inching-cylinder C and also by a driving (let ice P,such as ulleys, 1g. 3,)

to rotate the latter in unison with. the driven press-mil 2?, it beingunderstood that the retation of the couch-roll G causes the first dryingvlinclcr ii to rotate. Thelatter is made hollow and is heated by steamor other suitable means, so that the sheet of paper is partial drybefore it passes from the first (lryii' wc tinder H onto the seconddryingcylinclcr i T and so on through the rest of he paper-makingmachine. (he the top of the first iryii'ig' cyiinder H is arranged a.doctor h to rercnt the return movement of tl sheet of paper on thedrying-cylinder H.

it is understood that when the machine is running and the feed-apron Dcarries the wet slmct beta en the pressrolls F F" then the wet Met insubjected to pressure to srgucczo out the Water, the auxiliary apron lprevcnlmg the sheet n'orn sticking to the upper prcsswoll. and hence thesheet is positirclj' carried along; by the licerhupron Y i ecmsclnroller G dryingcylincler the sh ct is partlv dried by contactryingpcylinrler H, it does not stick to the sam and hence passes readilyto the h c'\'lin le.r ii.

second I From the icrcgoing' it will be seen that the trek sheet oi"paper ii is not liable to stick and hri alr, and hence the machine isveryserviccahle for making very thin paper, such as tissue and toiletpaper, the arrangement permitting a continuous running of the 138,-pcrsnairing machine, thus increasing the canicity of the. machine, atthe same: time reiiucinc' the waste to a minimum and pro clucing abetter quality '05 paper.

Having thus described invention, l

r t claim as new and'desire to secure by Leti paper between thepress-rolls while interters Patent l i posed between the aprons, a(iryingeviinder,

1. A papenmaking' machine comprising a j a coiwh-roli for the, same andover which pair 01 press-rolls of which one is driven, p:isses ti1(apron carrying the sheet of paper aprons assing between the saidpress-rolls, to deliver t.he ;ietter to the dryiri -cvlim er, 20 one oft e aprons carrying the Wet sheet of i and means fo fidriving thecouch-roll in unipaper between the press-rolis While interson with thedriving press-roil; tliecouchposed between the aprons, adryirig-cylinder, roii driving the drying-cylinder. I and acouch-rollfor the same and over which i -in testimony whereof I have signed my 10passes the apron carrying the sheet of paper 1 name to thisspecification in the presence of 25 to deliver the latter to thedrying-cylinder. two subscribing, Witnesses.

2. A paper-making niachine'comprising a WILLIAM H. HOFFB'IAN.

pair of press-rolls of which one is driven, Witnesses: aprons assingbetween the said press-rolls, Rizsn F. LEWIS, 15 one of t e apronscarrying the wet sheet of WILLIAM. D. WATT.

